obvious, that is united states government had absolutely nothing to do with this video. we absolutely reject its content and message. >> reporter: no u.s. embassy personal was harmed today but they prepared for protests and tightening security. secretary of state hillary clinton also called pawn governments to stop -- upon the governments to stop the violence. >> any responsible leader should be standing up now and drawing that line. >> reporter: u.s. ambassador chris stevens and three others were killed in the attack on the u.s. consulate. >> a security official also said today armed militants used a protest of that film as a cover. and that infiltrators may have helped the militant, tipping them off to the location of a secret safe house. >>> authorities determined the identity of the man behind that film that may have triggered the violence at the u.s. embassy in libya. a source says she an arab christian. he is reportedly on probation for financial crimes. an actress in the innocence of muslims says the film crew was duped into thinking it was an arabian action film.